2. Game Analysis

3. Points! Points! Points! Where are the points? What are the limits?
Are there unlimited points opportunities?
Like lifting in Bowled Over!
Evan

4. Time How long will things take? Ex. double hanging
Are there low/no value goals that will simply waste time?
Ex. the floor goal
Nathan
Practice to develop a sense of how long different parts of the game will take, and if you will have enough time to do them
Use your knowledge of points to find parts of the game that are time/point inefficient

5. Other Robots How easy will defense be?
Autonomous was hard to defend in Block Party!
Rack was easy to defend in Ring It Up!
How many robots does it take to accomplish a given task?
Doubling hanging in Block Party!
Lifting in Ring It Up!
Sean
-Doubling hanging in Block Party would leave the other team able to double hang vs having one of the robots on your alliance playing defence if you didn’t think you could pull off the double hang

6. Exercise - Discussion Block Party Season
Try to get these points from the crowd
Difficulty of defense in autonomous and teleop
Compatibility between robots for double hanging
Block area getting crowded
Coaching decisions for balance and end game in general
(old) Try to get these points from the crowd (old)
grab & place rings fast
lifting not worth it (2 robots and slow), opponent could outscore your lift if they both were placing rings
weighted rings were very valuable, place them as you find them
control the space in front of the rack
AUTONOMOUS, free points, OWNING THE PEG, game dynamic change of playing from ahead

7. Your Robot Qualities

8. Your Robot What qualities should a robot have: Drivetrain
Block Party! - fast, being able to get where you wanted without getting stuck on blocks or robots
Block scoring pace was important for high scores
Ring It Up! - powerful, hold/take a position in front of rack
Scoring opportunities space constrained
Bowled Over - agility, speed more important than power
Sean
Pure pushing power was more important in autonomous than in teleop
Not getting stuck on blocks while playing

9. Your Robot What qualities a robot should have: Versatile Tools
Flag spinner that could be quickly adjusted to different heights
Lifting Mechanism that could adapt to other robots
Scoring Mechanism that could score from a wide range around the baskets
Sean
12 inch wall could be used to estimate the height of the flag spinner if measuring was not possible
Wide range of motion allowed us to work with most team’s lifting mechanism

10. Scouting

11. Criteria For Rating Robots
Create a scouting sheet based on how well robots do certain tasks
Game analysis improves after seeing actual matches
Use numbers to keep picks as objective as possible
Criteria are constantly evolving as season goes on
Evan, Caitlin, Emerson

12. Our Scouting sheet
Evan, Caitlin, Emerson

13. Exercise - Scouting Example
Evan
Hand out scouting sheets
explain scouting sheets
assign each person 1 robot around the room
Red
Red
Blue
Blue
Autonomous & stop
Teleop -
What did 1, 2, 3, and 4 do per the scoresheet (ask the crowd)

14. Results
Evan, Caitlin, Emerson

15. Results - 724
Evan, Caitlin, Emerson

16. Results
Evan, Caitlin, Emerson

17. Results
Evan, Caitlin, Emerson

18. Design Principles and Strategies

19. Design Principles and Strategies
KISS
Keep It Super Simple
Tool Design First
Leapfrog Development
Never go backwards
Repetitive Testing
Competitive Development
DRR Certified: Dependable, Repeatable, Reliable
Joey, Lauren
Questions / Discussion
Tool Design-Don't build a robot and then try to fix issues with programming.
Leapfrog so you never go backwards
-Block party, arm
Strategy, build your robot to complement partners…
-Hanging in Block Party, reaching over other robots
KISS
Keep it Super Simple
Tool Design First
Then we program the robot to use the tool
Leapfrog Development
This is our method for step-by-step improvement. We build a better new tool or program before we take apart the old tool or change the old program
Repetitive Testing
We make sure everything works at least 5 times in a row
Competitive Development
We try several options and the best one wins

20. Design Principles Applied
Measure twice cut once
Gearbox Design
Plan before you do
Understand the problem Before you try to fix the problem
-Change title Design Principles Applied
-Remove KISS ->Measure Twice cut once
-Plan before you do
-Understand the problem before you fix it

21. Hands-On Working Session

22. Practical Applications

23. Chassis/Drivetrain Stiff & Stable Frame Maneuverability
Rocker in a 6 wheel tank-drive chassis
Omni wheels on corners or one end
Ability to go where you want/need to for the game
Find the right balance of speed and power
Practice driving before the tournament
Be prepared to drive on all parts of the field
Nathan
On a 6 wheel tank-drive chass a rocker helps improve turning
Rocker can be achieved by creating a fulcrum with the center wheels
Increasing the diameter of the center wheels is one way to do this
Another way to improve maneuverability is to add omni wheel to the corners or one end of the robot
Based on testing find a balance of speed and pushing power that is optimum for the game
(Eg. strong heavy chassis for Ring It Up!, faster maneuverable chassis for Block Party!)
Practice realistic game scenarios in full 2:30 segments

24. Other Isolate your motors from impacts Traction < Torque
Mechanical Alignment
Program the knowns
Basket height
Picking up blocks
8 motors, 3 lego motors, 12 servos
Nathan
Don’t place your motors and their shafts in a position where they can get banged around during play.
This can ruin their gearboxes and make your motors unusable
The traction of your robot should always be less than your robot’s torque to prevent burning out your motors when you encounter something you can’t move during autonomous (eg. wall, field object, heavier/stronger robots)
Programing preset positions for different aspects of the game can improve your consistency and speed
This is talked about more in depth later in the presentation
When designing keep in mind your building limitations of only 8 DC motors, 3 Lego motors, and 12 servos. This year servos of any kind will be allowed.

25. Useful Tidbits

26. Checklists Checklist on body of robot for field setup
Checklist in pit for between match maintenance
In fact FLL changed the rules in 2008 to accommodate our checklists

27. Checklists
Sean
In fact FLL changed the rules in 2008 to accommodate our checklists

28. Engineering Notebook/Fundraising

29. Handwritten or electronic?
There is no distinction in judging between handwritten and electronic notebooks, so the decision is up to your team.
We have found electronic notebooks…
Are harder to lose (keep backup copies).
Look neater and more professional.
Are easier to format.

30. Formatting Details
Team name and number must be clearly visible on the outside of the notebook.
All pages must be numbered.
If using a bound notebook, there must be no pages missing.
All entries must be written in permanent ink.
Any mistakes must be crossed out using a single line.
Use both sides of the page and leave no empty space. Cross out any blank space (this is required for electronic notebooks too).
If electronic, pages must fit into a a single binder no larger than 1.5”.

31. Entries
Each entry should include a tasks column and a reflections column.
The tasks column should detail what your team did.
The reflections column should include observations, notes, plans for next meeting, etc.
Include sketches, pictures, CAD designs, relevant snippets of code, etc.

32. Sections of the Notebook
The engineering notebook must be divided into three sections.
Number each section separately so you don’t have to reprint the notebook for each tournament (E-1, E-2, etc. for engineering section, T-1, T-2, etc. for team section).
Team section
The team section should include information about outreach, team social events, etc.
Engineering section
The engineering section should document the robot design process.
Business section (optional)
This is the place for your business plan, strategic plan, or sustainability plan.

33. Team Section
Start the team section with brief biographies of each team member and coach/mentor. Include age/grade, interests and reasons for joining FTC.
Include a page for any social activity your team does together.
Include a page for each outreach event.
Describe the reason for the outreach event.
Describe the outcome of the outreach event.
Include pictures!

35. Engineering Section Take pictures of everything.
Include a bill of materials.
Write detailed descriptions of…
Observations
Thought processes
Design processes
Brainstorming sessions
Include…
Sketches
Code
CAD designs
Graphs

40. Planning Section
This section is technically optional; however, it is NOT optional for many awards (Inspire Award, Think Award, and Connect Award).
Use the strategic or business plan to identify team goals.
The plan should also include a budget and information about team structure.
This plan is valuable for identifying your team’s direction and ensuring all team members are working toward the same goals.
The plan is also a good thing to have for potential sponsors to show your team has a direction and a purpose.

46. Final touches Write your notebook summary.
Summarize your team’s journey this season and include references to specific page numbers.
Create a cover page.
Include your team’s name and number.
It should look professional – this is the first thing the judges will see of your notebook.
Add tabs to important pages.
Only use 6-8 tabs. Any other important pages can be referenced in your notebook summary.
Insert a copy of your robot’s Bill of Materials.

48. Resources Email us: FTC6085@gmail.com
Our website:
Resource page which includes sample engineering notebooks and business plans from our team and other teams:

49. Fundraising - Talking to Sponsors
Making a business plan
Finding sponsors
Know your audience
vs In-Person
What does the sponsor get out of it?
Keeping sponsors involved
Fundraising Toolkit
Rachel

50. Judging

51. Creating a Presentation
Divide the time: presentation and questions
Introducing your team
Make sure to include all parts
Technical details
Design process
Outreach
Fundraising
Practice!!!
Make sure the presentation flows
Practice answering questions
Rachel

52. Outside the Judging Room
Why should they remember you?
Keep someone in the pit as much as possible
Especially at State/Super Regional/Worlds
Small teams - leave a sign
Use your pit space for display
Rachel
Nathan - sign
Talk about how small teams should leave a sign at their pit while practicing or in a match to let judges know they should come back later

54. Lunch & Game Reveal Nathan 75% taps aluminum 50% taps steel
i.e. you drill a bigger hole for the same size screw and tap in steel, than you would in aluminum.
In our workshop materials, we have a tap chart
Doubling drilling means drilling more holes in a standard Tetrix channel to provide additional attachment points
A piece must be double drilled before it can be put on our robot
Subtractive technology is Laser cutting & CNC machining. It tends to give stronger parts, you can laser cut plastic. You can CNC metal
Rachel
additive technology makes more complicated shapes easily. You can make stronger parts by shipping

55. Rule Changes and Implications
No intentional grounding to floor <RG03> i.
No EV3 <R01> b.
No LEGO pneumatics <R01> c.
Tetrix Prime Gripper disallowed pn40234 <R02> l.
All raw materials are allowed <R04> a.
All post processed materials are allowed <R04> b.
All 1-degree of freedom COTS are allowed <R04> c.
AM-2256 / field-damaging high-traction wheels disallowed <R04> d.
Mr. Diamond, Joey D, Shawn Hunter ~10min
<RG03> i. - No intentional grounding to floor. This is a weird rule. Of course no grounding wires/chains/straps. And nothing else that is designed to ground. Obviously inadvertent grounding is OK. Like last year when many of the block scoops or bulldozer blades happened to be made out of metal. We still recommend you ground everything else in your robot to your frame. Make your robot have a single electronic potential.
<R02> full list of disallowed TETRIX parts
<R04> b. - pre-drilled extrusions, from other sources (servocity). Pre-drilled plates, treadplate, expanded steel.
<R04> c. - And finally any readily available single degree of freedom COTS! Hinges, pulleys, slides, gearboxes, etc.. Ratcheting box wrench?
<R04> d. - AM-2256 specifically disallowed. Be careful with other high-traction tires. Don’t be surprised if other tires get specifically ruled against.

56. Rule Changes and Implications
Ferrite chokes allowed <R08> b.
AndyMark Neverest (AM-2964) motors <R09> b.
Any quarter-scale or smaller servo <R09> c. i.
5 Amps stall current per servo controller <R09> c. ii.
Motor shafts may be modified <R09> g. ii.
9v battery w/ Prototype board <R11> d. i.
Mr. Diamond, Joey D, Shawn Hunter ~10min
<R08> b. - Use ferrite chokes on any signal wires that can act as antennas.
<R09> b. - New AndyMark motor has similar torque and stall characteristics but will survive approx. 2:40 at stall, compared to 0:07 for Tetrix V2 motor.
<R09> c. ii. - The hard part is finding documentation on the stall current.
<R09> g. ii. - This could actually be pretty big. Attach gears/sprockets to motors in a better way.
<R11> d. i. - Prototype board opened up a lot. With power restriction gone allows you to hook lots more stuff to NXT.

57. Goal Setting What do you want to accomplish this season?
What do you want to accomplish by your first tournament?
How hard do you want to work?
How well does that effort align with your goals?
What do you want your coach
to do to help you achieve
these goals?
Sean

58. Common Sense Mechanics

59. Making Parts Flat metal can be easily bent to make parts Tapping holes
Steel vs aluminum
File, sand, polish
Rounded plastic corners (using a torch)
No sharp corners or edges in general
Double drilling your channel
Laser cutting
3-D printing
Nathan
75% taps aluminum
50% taps steel
i.e. you drill a bigger hole for the same size screw and tap in steel, than you would in aluminum.
In our workshop materials, we have a tap chart
Doubling drilling means drilling more holes in a standard Tetrix channel to provide additional attachment points
A piece must be double drilled before it can be put on our robot
Subtractive technology is Laser cutting & CNC machining. It tends to give stronger parts, you can laser cut plastic. You can CNC metal
Rachel
additive technology makes more complicated shapes easily. You can make stronger parts by shipping

60. Double Drilled vs Regular
Briuanunayesanana

61. Bending Plastic
Evan

62. Building Practices Keeping screws and set screws in
Nylocks
Lock-tite and pre-nylon threaded set screws
Don’t transmit loads through axles
Understanding friction/traction
Surface area doesn’t change friction
F=µFn
Components under tension & compression
Joey
-The force of friction =coefficient of friction*normal force
-Over time, screws and set screws will fall out
30-40lbs pushing ability
5lbs per wheel at a 2” radius is a 105 lb load at the axle
Easy to bend, but hard to squeeze and stretch
-Can make light and strong structures if principles are understood
-i.e putting spacers in channel
-Soda Can Challenge

63. Never Transmit a Load Through an Axle!
The Numbers
4” diameter wheels
30lb of force spread across 6 wheels
3/16” diameter axles
What's the load pushing on each axle set screw?
Joey
30-40lbs pushing ability
5lbs per wheel at a 2” radius is a 105 lb load at the axle
1/32 radius axle fits times in a 2 inch radius wheel.
This means 5 pounds at the edge of the wheel (21 x 5) is around a 105 pound load at the set screw on the axle
With our system 5 pounds at the edge of the wheel is 30 pounds shearing force on 4 screws
This is a much safer system than transmitting loads through an axle
30lb at 6 wheels-5lbs per wheel
(5lbs/(3/32)=x/2
3/32 =half the axle
64/3=21.3
21.3x5=106.6

64. The Math
The ratio between the radius of the wheel and axle will translate into the ratio of force each element bears.
axle radius = 3/32” or .094”
(2”) / (0.094”)=21.33 ratio
5 lbs at 2” = lbs at 0.094”
With the sprocket and 4 screws… (8mm = .314”)
(2”) / (0.314”)= 6.37 ratio
5 lbs at 2” = lbs at 0.314”
spread that over 4 screws and you get
31.85 lbs / 4 screws = 7.96 lbs per screw
lbs/in =torque (how much force at the radius)
5lbs at 2” =160 oz/in of torque (½ of a dc motor output)

65. Regular Wheel with Sprocket
Answer: 106 ⅔ lbs pushing on the set screw
The Wheel w/ sprocket changes the load from 106lbs on each set screw to x amount lbs spread across 4 screws
New radius = 8mm (0.314in)
= shearing on each screw, now a shearing force
(5lbs/8mm)=(x/2)=31.8lbs over 4 screws =7.96

66. Tools, and Using Them Color coding tools
ROYGBIV
Good mechanics have their own tools
Removing cross-threaded machine screws
Vice grips
Drill out
Removing rounded out machine screws
Easy outs
Sean
Colored bands represent tool size
Orange: Socket Heads
Yellow: Axle Hubs
Green: Button Heads
Blue: Old Style Axle Collars
We all have our own set of tools that way if we are going to help a team we can take our tools and the team will still have theres
Increase the size of your lever

67. Easy Outs

68. Calculating Loads on Lever Arms
Margin of Safety
At least a 2:1
Exercise
Use a lever arm on your robot or make one including:
A DC motor
At least one gear change
A lever arm on the end
Using your setup, calculate the reasonable max weight your lever arm could elevate
Evan
Should bring Block Party! arm

69. Calculating Loads on Lever Arms

70. Motor Power Table Motor Name Speed (RPM) Speed (Radians/Second)
Torque (oz/in)
Torque (Newton/meters)
Power (Watts)
DC 12 volt Motor
150 16
300
2.12
33.26
PF XL
220 23 56
0.40
9.11
NXT Servo
170 18 70
0.49
8.80
PF M
405 42 15
0.11
4.49
180 Servo 60 6 84
0.59
3.73
PF E
780 82 5
0.04
2.88
Continuous Servo 43 39
0.27
1.24
Evan
Need motor stats/limits
Should bring Block Party! arm

71. Common Sense Electronics

72. Miscellaneous Tin wires Use a power bus Redundant power supply
Charged batteries
Power supply and DC motor power consumption
Sean
Tining wires allows for neater and more reliable electrical connections
Using a power bus allows separate power supply to each controller instead of daisy chaining (Christmas lights)
We also pair up motor controllers that way if we lose power to one we can get it from its partner controller
Always have fresh batteries for the a new match. When testing autonomous, you will want to change batteries every couple of rounds so that you are running with a fairly consistent level of power
Motor controllers supply up to 4 amps per channel; 0.17 amps at no load; 1.05 amps at max efficiency; 2.46 amps at max output; 4.55 amps at stall

73. Daisy Chained Electronics
Sean

74. Anderson Powerpoles® Tamiya vs Powerpole®
Sean
Powerpole® is a registered trademark of Anderson Power Products®

75. i2c Communications Short i2c wires and total length (less than 3ft)
i2c protocol voltage
Interference (motors)
Wire chokes
Sean
Explain i2c protocol voltage drops
Short Wires
<36 inches
Avoids running wires past potential interference
Powerpole® is a registered trademark of Anderson Power Products®

76. How Everything Works Together
Lauren

77. Static and Grounding Connect the frame Plastic acts as a capacitor
Connect your plastic
Connect your electronics
Not allowed to intentionally ground to the field
Evan

78. Static Detector
Evan

79. Samantha Bracket
Evan you could add a pic of the AndyMark 3D printed bracket. There is a nice pic on their website and they offer free download (see above)

80. Decreasing Static Plastic vs metal panels Conductors and Insulators
Anti-Static spray
Lauren

81. Electronics Testing Evan Own all disconnects
Look for faults in your own robot before the FCS or FTAs

82. The Coach, Teaching “Basic” Things
Measure Twice Cut Once
Pilot Holes
Tinning Wires
Drill Press Jigs
Using a Fence with a Saw
File, Sand, and Polish
Torch or Heatgun?
Bending Plastic with a jig
Precise Drilling (for double drilled extrusions)
Chain 180° Around Sprockets
Mr. Diamond + Shawn
Sean - measure once cut twice, bowling ball hoop?
Nathan - torching the plastic
Evan - pilot holes when swiss cheesing

83. Hands-On Working Session

84. Programing
Sean, Evan, Rachel, Jamie

85. RobotC vs LabVIEW Smaller programs can hold more function on the brick
Faster Execution Time
(this is older information, LabView has improved)
Really fast Emerson + Sean

86. Versioning and Change Log
teleop
Keep old version of working program
Keep a change log and comment your code
Make sure you test multiple times before the competition!
Really fast Evan

87. Shorten FCS Timeout
nNoMessageCounterLimit = 150; //stop robot faster on disconnects (default is 750)
Mr. Diamond

88. Drive Code
Make your own!
Evan

89. Drive Code - Preface Why? Customization/personalization
Driver specific
Game specific
You understand it better
Evan

90. Drive Code - Parabola & Dead-Zone
Evan

91. Drive Code - Parabola & Dead-Zone
Square the joystick value
Subtract 100
Multiply it by 100/(128*128) or
This gives you a value from 0-100
Multiply the sign back into the value
Return the number
Evan
algorithm to calculate the values

92. Drive Code - More Cool Bits
Low gear/Programmatic Gear Shifts
Going straight
Top Hat arcade drive
Regular tank drive
Built in PID logic
Slow but strong
Evan

93. Anti-Stall Logic (Autonomous)
Only watch when power is applied to the motors
Store the encoder value
Wait a short time
If the encoder value is very similar, the motor is stalled
Mr. Diamond

94. Anti-Stall Logic - Example
Mr. Diamond

95. Anti-Stall Logic - The Code
if(abs(driveSpeed) > 0) {
if(abs(currentRightEncoder - previousRightEncoder) < 4)
rightStallCounter++;
else
rightStallCounter = 0; }
if(rightStallCounter > 200)
//writeDebugStreamLine("RIGHT STALLED");
motor[motorRight] = 0;
motor[motorRight2] = 0;
motor[motorLeft] = 0;
motor[motorLeft2] = 0;
wait10Msec(200);
Mr. Diamond

96. Sporadic Bad Encoder Values
...
Rachel with Mr. Diamond as backup

97. Other... Multi-threaded Programming Pros
makes it easier to program multiple things happening at once
timing can be simpler
easy to automate routines
Cons
CPU time
CPU/Process interruption
keeping track of everything
We use it
It is a personal preference
Evan

98. 3rd Party Driver Suite Using Xander's 3rd party driver suite
Mr. Diamond

99. Automated Functions Automate routine functions Robots are good at
Doing the same thing
Repetitive tasks
Controlling/manipulating multiple parts at once
Humans are less capable of
Exact repetition
Performing under pressure
Rachel

100. Preset Positions Nathan
This video shows an example of automated functions on our Ring It Up Robot!
We created 3 preset positions for each height on the rack using automated functions activated by one button

101. Bowled Over Robot Nathan
An example of more complex automated functions that are coordinating the movement of three joints

102. Sensors, MUXes, SMUXes, and Wires

103. MUXes HiTechnic Sensor MUX HiTechnic Touch MUX Sean
Sensor multiplexer has an independent battery power source. The SMUX pictured uses the old style 9v box, the newer SMUXs use AA batteries.
Touch multiplexer does not have its own power supply, and it can only be used for touch sensors.

104. NXT Sensors Gyro IR-Seeker Light Accelerometer Angle Color Ultrasonic
EOPD
Nathan
Sensors
SMUX
More sensors!
To give a sensor its own power supply
Gyro
To know the direction we are pointing
Compass can be affected by the other metal around it
Odometry can be affected by hitting other objects and wheel slippage
IR-Seeker
Used to detect the IR beacons that usually used during the autonomous period of the game
Light
Finding lines
Lets you know exactly where you are by known field element locations (recalibrate position)
Accelerometer
Used to detect acceleration or angle
Angle
Measure angle on driven axle
It stores it between power cycles (even if it has moved with the power off)
Don’t have to worry about gear changes
EOPD
Measures distance
Color
Can tell the difference between actual colors rather than the amount of light reflected off a surface
Can also be used like a regular light sensor

105. Encoders and Thermal Motor Cables
Encoders are used to measure distance
More accurate than time-based movement
Will keep pushing until travels far enough
Fragile and expensive, so be careful
Only use thermal cables for testing
Nathan
Thermal cables should only be used for testing because they limit the amount of power the motors can receive
Additionally, after a thermal cable trips, the threshold for failure will increase, eventually creating an unusable cable

106. Custom Parts

107. Prototyping Use easy to manipulate materials
(cardboard, foam board, duct tape, etc)
Revise as needed before final part (saves time and money)
Brianna

108. CAD Programs PTC Creo Pro Autodesk Inventor Gear Generator
Joey
Design First
PTC Creo-Sponsors First
Autodesk-What Metro uses
-Easy to learn
-Measure Twice, cut once, i.e gearboxes worked on first assembly
Gear Generator
-Creates patterns for involute gears, to be made with various materials
-Involute=curved teeth
-Understands the complexity of the gears
-4251 cuts gears with teeth a little bigger, needs finer tools

109. Tools Laser Cutter CNC Machine Sheet Metal Shear Sheet Metal Brake
Polycarb and PETG
Sheet Metal Brake
Machine Lathe
Evan

110. Steel and Plastic When to use steel Your best plastics PETG Delrin
Polycarbonate
Lauren

111. 3D Printing When to print your own parts
Web order 3D printing (Shapeways)
Some companies can print steel
Andymark Samantha brackets
Sean
Good for prototyping
In general not very strong unless you have access to a high quality printer
Andymark has a file for a 3-D printable Samantha Bracket available for free on their website (based on our original laser cut design)

112. What to Buy

113. Important Extra Parts Extra channel “L”s, “C”s, and inside “C”s
1.25in aluminum stock
“L”s, “C”s, and inside “C”s
Other size and length (still 6/32) nuts and bolts
Plastics
PETG
Delrin
McMaster Carr
Nylocks
Locking set screws
Countersunk screws
Nathan
Petg plastic is stronger, and cheaper than delrin. It also is translucent which makes it good for shields.
Delrin is good for gears and other moving parts because it is self lubricating. Both can be cut on most laser cutters.

114. Sources of Information

115. Useful Websites Official Game Forum
Chief Delphi
ROBOTC Forum
Xander Soldaat
Cougar Robotics
Patronum Bots
Sean

116. Additional Useful Websites
Hitechnic
Lego Education
Digikey
McMaster-Carr
Instructables
FIRST Fundraising Toolkit - for notebook and fundraising information
Sean

117. General Discussion and Open Workshop